About Umag, Istria's Climate & Weather History

With a population of around 6,800, Umag sits in Istria, Croatia. The city operates in the Europe/Zagreb time zone.

In 2025, Umag recorded an average annual temperature of 60°F. The hottest temperatures reached 98°F in August; the coolest were 30°F in February. Total precipitation for the year was 58 inches, with the wettest month being October.